DSpace DSpace

University of Minnesota Digital Conservancy >
University of Minnesota - Twin Cities >
Minnesota Geological Survey >
Report of Investigations >

Please use this identifier to cite or link to this item: http://hdl.handle.net/11299/60460

Title: RI-24 Manganese Resources of the Cuyuna Range, East-Central Minnesota
Authors: Beltrame, R.J.
Holtzman, Richard C.
Wahl, Timothy E.
Issue Date: 1981
Publisher: Minnesota Geological Survey
Citation: Beltrame, R.J., Holtzman, R.C. and Wahl, T.E., 1981, Manganese Resources of the Cuyuna Range, East-Central Minnesota, Minnesota: Minnesota Geological Survey Report of Investigations 24, 22 p.
Series/Report no.: RI
24
Abstract: The Cuyuna range, located in east-central Minnesota, consists of a sequence of argillite, siltstone, iron-formation, graywacke, slate, and quartzite of early Proterozoic age. Manganese-bearing materials occur within the iron-rich strata of the Trommald Formation and the Rabbit Lake Formation. Computer-assisted resource estimates, based on exploration drill hole information, indicate that the Cuyuna range contains a minimum of 176 million metric tons (MMT) of marginally economic manganiferous rock with an average grade of 10.46 weight percent manganese. The calculated 18.5 MMT of manganese on the Cuyuna range could supply this country's needs for this important and strategic metal for nearly 14 years. An additional resource of 6.9 MMT of manganese metal is available in the lower grade deposits. The vast majority of these calculated resources are extractable by current surface mining techniques.
URI: http://purl.umn.edu/60460
ISSN: 0076-9177
Appears in Collections:Report of Investigations

Files in This Item:

File Description SizeFormat
mgs-244.pdf592.94 kBPDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.